Jawablah 2 pertanyaan berikut!! #NoSpam #SpamLangsungHapus

Gerak Melingkar
Kelas X

29.]
Rₐ = 25 cm = 0,25 m
Rb = 15 cm = 0,15 m
Rc = 40 cm = 0,4 m
[tex] f_c = n / t \\
f_c = 120 / 120 \\
f_c = 1 \ Hz [/tex]

[tex] \omega_{c} = 2 \pi f_c [/tex]
= 2π rad /s

Sepusat , [tex] \omega_{c} = \omega_{b} [/tex]
[tex] \omega_{b} [/tex] = 2π rad/s

[tex] v_b = \omega_{b} [/tex] • Rb
= 2π • 0,15
= 0,3π m/s

Terhubung , [tex] v_b = v_a [/tex]
0,3π = ωₐ • Rₐ
0,3π = ωₐ • 0,25
ωₐ = 1,2π rad / s

Jadi ωₐ = 1,2π rad / s , [tex] \omega_{b} [/tex] = 2π rad/s [C]

30.]
Rₐ = 50 cm = 0,5 m
Rb = 20 cm = 0,2 m
Rc = 10 cm = 0,1 m
vₐ = 1 m/s

[tex] \omega_{c} [/tex] = _ ?

ωₐ = vₐ / Rₐ
ωₐ= 1 / 0,5
ωₐ = 2 rad / s

Sepusat , ωₐ = [tex] \omega_{b} [/tex]
[tex] v_b = \omega_{b} [/tex] • Rb
[tex] v_b [/tex] = 2 • 0,2
[tex] v_b [/tex] = 0,4 m / s

Terhubung , [tex] v_b = v_c [/tex]
[tex] \omega_{c} = v_c / R_c [/tex]
[tex] \omega_{c} = 0,4 / 0,1 [/tex]
[tex] \omega_{c} = 4 \ rad / s[/tex] [D]